Dust-collector.



W, E. ALLINGTON.

DUST COLLECTOR.

APPLICATION FILED MARVZ5, 19'09.

Patented May 16, 1911.

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v VI/20072597 cum M5 CP/II/I/L/QILE/WW WILLIAM E. .IALLII'NG'ION, or sasmhw, rumors.

DUST-COLLECTOR.

Toall whom it may g Be it known that I, WILLIAM E.'ALLING- I TON, a citizen of the United States, residing mean, a tu at Saginaw in the county of Saginaw and State of Illinois, have invented certain new and useful Improvements in Dust-Collectors, of which the following-is a specification.'

My invention relates to improvements in dust collectors, and more particularly to, centrifugal dust collectors, comprising generally a casing into which air is introduced through an inlet near its top in such manner as to-set up a vertical whirl therein, said. casing being provided with a dust outlet adjacent its'bottom and with an air outlet opening in its top surrounded by a depending tubular guard. In such dust collector constructions it is distinctly advantageous to provideatapering tu ular guard flaring downwardl and outwardly,by which I lihlar guard of any suitable contour between its ends, having its lower or intake end larger than its upper or delivery end,'so that the bottom of the guard may receive air in a zone radially beyond the area of the outlet opening proper, provided that in conjunction with such tapering guard means he em loyed for interrupting, or preventing the ormation of, a whirl within the guard. Various constructions have been proposed for attaining these advantages by the employment'of tapering tubular guards having positioned for operation in conjunction therewith deflectors structurally inde pendent of the side walls of the guard although sometimes attached thereto. I have found that the use of independent deflectors may be dispensed with by the construction of a tubular guard. of tapering formation,

-- having its walls so contorted as to provide -air directing parts in disposition to direct air in pathstcnding to prevent the formation of a whirl within the guard.

' tion, and; Fig. 2 is a view showing the end In the drawing; Figure 1 is a central vcr tical section of a dust collector equipped with a tubular guard embodying my invenconformation of such a guard; Figs. 3, 4 and 5 are views sim'ilar'to Fig. 2 showing difi'eren-t configurations of guards within the teachings of my invention.

Referring to the drawing, 10 indicates in general a dust collector casing of a'well nown type,--typifying any suit ble structure-providing an upper separaing chamk Application filed Batch 25, 1909. Serial No. 485,633.

' Specification of Letters Patent. Patented May 16, 1911.

guard, generally indicated at 17, The uard s of tapering construction, flaring ownwardly and outwardly, that is to say it is ripheral wall of the guard is contorted to provide integral parts in disposition to direct air in paths tending to prevent the format1on of a whirl within the guard. This may be accomplished with various configurations, and in the drawing I have shown a.

the fact that the invention may be variously embodied as to precise form'without-departure from its spirit and scope, it being understood also that the form of the casing may be varied likewise. In general, how ever, it is my preference that portions of the bottom or intake end ofthe tubular guard shall extend outward tosuch'radial distance as to be in vertical register with the zone of the inlet 15, that is to say, shall extend beyond the radius line to which the innermost figuration for the lower or intake end 'of the tapering tubular gua'rd to accomplish the desired results, I contort the lower portion of the guard to provide inte ral portions of its side wall at varying radia distance from the axis, so asto form downwardly opening taper of the guard. a

As shown in Fig. 1 the flaring guard is of indented outline (shown in plan in Fig. 2) throughout its entire periphery, the indented formation extending a suitable distance up the guard, from its intake end so as to pro vide downwardly and inwardly opening As shown in'Figl 3, however. the outline might be crenelated, in which event the channels 18 would be oblong, or it might be polygonal, as shown in Fig. 14, in which case the channels 18" would be longer-sided angles than in the form showninyFig. 2, or

channels extending upwardly a suitable dis-- tance and converging upwardly. with the channels 18, converging upwardly with the taper of the guard for a suitable distance.

ber 11', a conical dust-discharge portion 12, I

and a deck or top 14,

shown), and the top 14;

16 in which is secured the depending tubular smaller at its upper or delivery end 17 than I at its lower or intake end 17", and thepe .few configurations merely as. indicative, of

portion of the inlet 15 reaches, as'well shown in Fig. 1. In providing a suitable conit might be scalloped, as shown in Fig. 5,

whichcase the channels 18". would bep articircular in cross-section.

In" any of these forms, however, the portions 19, '19-, etc, in planes atright angles to the axis, exs

. tend at varyingradial distances from the" points/of the lower or intake'edge of the tubular guard, when bodies of air will enter the channels provided in the construction of the guard wall and flow upwardly and inwardly therein, substantially without rotatifie movement about the casing axis. The guard is so constructed that/the combined capacity of the channels at their lower ends may be properly related to the volume of air flowing through the machine so that the directing action of the wall portions 19 of the channels eccentric to the axis, .will overcome the rotative tendency of such air as may pass the radially'innermost portions of the peripheral wall or, in brief, the channel directed currents should dominate. It will be apparent. to those skilled in the art that as the action, of the guard wall, witlnits portionsat varying radial distance from the- F axis, is to break up the whirling action within the guard,;-and the difierence in diamemr between the top and bot-torn of the guard, enables the air to have 'access to the lower open, end of the guard after a minimum radial traverse .against centrifugal resist-' ance, the general effect-of. the guard is to pipe the air out from the radius of its'bottom opening to the radius of its top opening without .the resistance of centrifugal action, thereby to produce high power-efficiency within the machine.

-Having described my. invention, what I claim is.: t;

i 1. In a dust collector, the combination with a-casing, providing a top air. outlet and a m'aterialsmlet near the top, of a tapering tubular guard depending from the air outwith a casing let, flaring downwardly and outwardly A distances from the axis, forming down- ,wardly o ning channels conver mg up- .wardl with the taper'ofthe guar 2. Iii a dust collector, the combination roviding a top ,air outlet and a-materials in ct near the top, ofatapering 'tubular guard depending from the air outlet, flaring downwardly and outwardly, said guard havin mg intoyertical register with the inlet zone, and having the lower portion of its side wall contorted toprovide integral parts at varying radial distances from the axis of the guard forming longitudinal channels in the wall converging with the taper of the guard to direct air upwardly and inwardly, thereby to prevent the formation of a whirl within the guard. v

3.- In a dust collector, the combination of a ageing providing a top air outlet and a materials inlet near the top, of a tapering tubplar guard depending from the air outlet flaring outwardly and downwardly, said guard consisting of 'a sheet metal of a single thickness through substantially its entire peripheralextent, said guard having portions of its bottom extending into vertical register with, theinlet zone, and having the lower portionv of 'itsside wall contorted to regularly approach and recede from the axis of the guard,-the points of closest approach of said wallto the axis lyingiin the circumference of an imaginary circle described about the axis, and the portions of said wall lying beyond 'said imaginary circle forming longitudinal channels in the wall at regular "intervals throughout the circumference of the guard, such longitudinal channels, being of appropriate joint capacity sufficient to direct air in longitudinal paths to dominate the whirl tendency of the air, thereby normally to prevent the 'formation of a whirl within the guard. I

In testimony whereof I hereunto set my handin. the'presence of two witnesses.

-' WILLIAM E, ALLI'NGTON.

.In the presence of i MARY F.- Annals, Foniin Bun.

portions at'its bottom extend- 

